"Employ your time in improving yourself by other men's writings. So you should gain easily what others have labored hard for." Socrates
Socrates was a smart dude. He recognized the value in learning from others in a time when information was really hard to come by. Today, there is no excuse to learn from others and there is no excuse not to learn more and get better at what you do. There are a million avenues from books, to blogs, to online courses, to audio books, to podcasts, to virtual masterminds, you name it. That being said, it's also important to find the right information and write people to learn from. With a lot of information available also brings a lot of BS. My advice, find the best people who do what you want to do, and learn everything possible from them.